UNIVERSITY OF MISSOURI
COLLEGE OF AGRICULTURE
AGRICULTURAL EXPERIMENT STATION RESEARCH BULLETIN 62
NORMAL GROWTH OF DOMESTIC ANIMALS (Pllblication
:l.uthorizcd June 30, HI22.)
COLUMBIA. MISSOURI NOVEMBER, 1923
UNIVERSITY OF M ISSOURI COLLEGE OF AGRICULTURE
Agricultural Experiment Station nOI\JtlJ 01·' CON'rHO!.
THE CURATORS OF THE UNIVERSITY OF MISSOURI EXECUTIVE BOAIW OF THE UNIVERSITY P. E. UURTON, . lltin Jo
E. [.ANSING RAY,
D., PRESIDENT OF THE UNIVE;RSITY
A. G. HO GA N , Ph. D. L. D. HAIGII, Ph. D.
RITCUU:, A. 11'1. E. E, VANATTA, M. S. A. R. 1-1,01.1., n. �. in Agr. fl. !'II. l-h�SIlAIV. M. S. }. 1�. BUNTf.I!. JOliN L. NlIl ••"Hf, A. I'll. W.
}. C. WOOI,f.\', 13. S. �fAc" M. JONf.S. Il. S. W. C. HOI/H\', H. S. in Agr.
E. L. A. II. D. M.
A. TIlOWIlR10Gf., Il. S. in Al:"r. A. WI!AVJ';II, D. S. in Agr. G. 1'loGAIl, Ph. D. 11. M UIot�OIlD , M. S. W. C I lITHllll(tl" , D. S. in Agr. T. POSTEll, n. S.
BOTANY W. J. ROUBIIlS, Ph. D. 1. 1'. SCOTT, B. S. in Agr. DAJI(V HUSBANDRY A. C. UAGSUAl.lt, U. S. in Agr. WM. H. E. flY.lIl, A. M. SAI.IU�I. O�OUY, M. A. C. W. 'J'VIlllt;R, A. M . D. H. NfI..SOIl, A. AI. W. P. I'[AYS, n. S. in Agr. J. D. Ni!LSOIl, A. M.
L EON .....D H...sUUN, Ph. D. K. C. SUI.l.IVAN, A. M. O. R. MCOIlIlli!, D. S. in Agr. NIlI!!.Y 'l'uII II1;11;, B. S. in Agr. FIELD CROPS W. C. ETIlEII;IDGIt, Ph. D. C. A. I-IF.l. lot, A. M. L. J. STIIIlI.I!II, Ph. D. O. W. LI!TS OII. A. M. MISS R IlGINIl SCIIUl..Ti!, A. D.-
This is illustrated by
chemical and biological handbooks.
MUMFORD, M. S., DIRECTOR S'I'A'l'ION
01i'F1CEUS 010' 'l'IlE STATION C. JONES, PH. D.,
useful time-saving devices to those who have occasion to make use of numerical data.
'I'lIE MISSOUIU STATE DO,\RD OF AGIUCUl/fUnE
Conveniently arranged tables are among the most
The time is arriv
This bulletin is a first cooperative attempt to put
into convenient form scattered data on growth of farm
O. R. )0111-15011, A. 111. S. D. GIIOAIY.II, A. M. E. r�. !...IOIIGAll, A. M. D. II. FIIAWt, IJ. S. in Agr. D. R. COW,HI. I'h. D. W. L. WITTy', A. M.
J. TIILD�IlT, A. M. H. G. SWIlIlTWOUT, D. S. in Agr. H. D. HOOKI!R, }II .. Ph. D. T.
H. L. K�MPSTI!K, B. S. E. W. HUO)HIISOtl, 11. S.
M. F. MII..L(II, M. S. A.t H. H. KIIUSU:O�f, A. M. W. A. ALDIIECIIT. Ph. D. F. L. Dul..l':\·, A. M. WI.!. DE\:OUNG, B. S. in Agr. H. V. J0111..... N, U. S. in .-\gr. RICII AIID llIlADfIHI.U, Pli. D. 1';. n. POWI!I.I.. B. S. ill Agr. R. J.o;. VIlLANIl, Jl. S. in Ail"\". VE;TEIUNARV
J. W. CONII... W... Y, D. V. S., M. D.
L. s. B"'CKU�, D. V. M. O. S. CIlISI..r.:K. D. V. M. A. J. DUIIANT, A. M. H. G. NEWI.IIIN, A. M.
OTUE;R OFFICERS R. B. Pille!!, M. S., Treasurer LESLIE COW... Il, B. S., Seerctary SliM D. SlIIRKIlV. A. M., AS5t. to Direetor A. A. JI!�FII�Y, A. D., ,\gricu[lural J.o;dilOr J. F. n... MIlIII.!, Photographer MISS J... Nf FKOIlSILHt, Librarian E. E. UWOWN, Ullsinc5s Manager
'In the service of U. S. Departmcnt of l\gricultllre. tOn \eaye of allsence.
These curves and tables will be useful to the growers of mals, as norms, or standards of grO\-vth.
They may al
so be of interest to the general student of growth. A word concerning the persons who inspired the
A. M. llUIlIIOUGIlS, ,\. 111.
]n addition to the numerical data, curves are
presented to show the process of growth as a whole. animals and to investigators in nutrition of farm ani
). T. QUWII,
acculllulation of data on growth
in this Station:
former director of this station, I-I. J. Waters, and the present director, F. B. Mumford have taken much in terest in, and macle important contributions to, the sub ject of growth. tion is due in two men.
The accumulation of data in this Sta large measure to the stimulus of these
The undersigned were appointed by Dire.
tor Mumford as a committee to alTange the availal)le data on growth for publication in this bulletin, and make additions to this compilation from time to time. C. R. :tvloulton H.
A. C. I-logan Samuel Brody.
Normal Growth of Domestic Animals I N TRODUCTION
F. B. MUt.1FORD
The physiological phenomenon of growth in the domestic ani
mals is undoubtedly the most important single factor, not only in research but in the development of animals for economic and commercial purposes. Page 3
is important to determine i f possible
standards of gruwth which may be lISCU by investigators.
cause of a lack of slIch standards, it is now difTicult to coordinate the
Investigators are handi
capped in growth studies of the domestic animals because there are no satisfactory standards of normal growth available.
Data on Growth:
what is normal growth in the domestic animals and to establish
The Equ i valence of Age
6 18 26 28 36
The Missouri Experiment' Station has during a number of years conuucted growth experimenls in several deparlments and has assembled from other sources valuable data
publication hy various authors interested in growth studies is a rlrst attempt on the part of growth standards.
to establish normal
It is hoped that the publication of these re
sults will suggest similar contr ibutions by olhers, and that in the end we may have comparatively definite standard growth curves which will give greater definiteness to growth studies.
and charts submilled in this publication w i l i be revised from time to time as further data acculllulate.
MISSOURI AGR. Exp. STA. RESEARCH BULLETIN 62
GROWT!-I CURVES FOR BEEF STEERS
only comment we have to offer is that possibly the method of feeding may have obscured any tendency to cyclic growth.
A. G. HOGAN, If. D. Fox The
kindly sent us by Prof.
t 'I'All!.I� l.-AVE�AGE WET�HTS 011
Haecker, and are presented as un
Age in months (28 days)
The method of feeding these steers has been described in Bul letin 193 of the Minnesota Station, and will not be repeated here. Our interpretation of their statement, however, is that these steers were not fed to grow at the maximu111 rate, but were fed to grow as rapidly as practicable under ordinary conditions.
ill ' ! Chan }